Method of preparing paper-pulp.



H. JAOKSON.

METEOD OF PREPARING PAPER PULP.

APPLICATION PILED MAR. 13, 1911.

1,083,1 02. Patenfced Dec. 30, 1913.'

5 SHEETG-SHEET 1.

Fgl x 'WITNESSES INVENTOR H. JAGKSON.

METHOD OFPREPARING PAPBR PULP. APPLIOATION FILBD MAR. s. 1911.

1,083J102. 4 Patented Dec. 30, 1913.

5 SHEETS-BHEET 2.

wTNEssEs INVENTOR mwa Za? Ua; Z (3072/ H. JAGKSON.

METHOD OF PRBPARING PAPER PULP. VAPPLIOATION PILBD MAR. 13, lll.

Patented Dec. 30, 1913.

5 SEBTs-SHEBT 3.

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wrrNEssES INVENTOR %7 0% ckdoz H. JACKSON.

METHOD OF PREPARING PAPER PULP.

APPLICATION PILED MAR. 13, 1911.

1,083,102. 4 Patented Dec. 30, 1913.

A 6 SHEETS-SHBET 4.

INVENTOR .Hero Zd ccazz H. JACKSON.

METHOD OF PREPARING PAPER PULP.

APPLICATION FILEDvMAR.13,1911.

I mm 9 i Patented Dec. 30, 1913. I

5 SHEETS-SHEET 5.

- they will spread out and HAIonD JAKSON, OF GARSTANG, ENGLAND.

Mnrnon or PREPA-RING PAPER-PULP.

Specificaton of Letters Patent. ,Aphfitio filed March 13, 1911.

g Patented Dec. 3o,.1e13 i Serial No. 614,165.

To all 'whom-it may cancm':

Be it known that I, HAROID.JACKSON, a British subject, residing at Garstang, County of Lancater, England, have invente'd certain -new and useful Improvements in the-Method of Preparng Paper- Pulp, of which the following is a specification.

This invention relates to improvements in the 'process of' pulping or hydrating fibers previously ground or finely divided for paper making with the object of expediting and more' thoroughly effecting the hydration of the eellulose' material and ultimately of 'obtaining a stronger paper he f m 'In the preparation of pulp for paper' making, it' is customary to treat the fibers, after being broken up or finely comminuted, in a beatngmachine in 'order to saturate them or hydrate them to such a degree that adhere in thin sheets dependsheets, the strength of such degree on the degree of ng to alarge hydration obtained.

In the type of heating machines -in more general use a horizontal roll fitted with steel blades is rotated above a'bed plate of similar Construction, between which the pulp is carried. again and again during its circulation through the knves Various forms of rotating beaters have been proposed or constructed carrying vans, knives, prongs or rubbers which revolve upon a shaft within a casing, and in these machines, the shafts and their attachments rotate in a circular path, the pulping and hydrating action being obtained by the abrasive` rubbing, rolling, grinding, or tearing of the rotating part against 'stationary part or parts. Other forms ofr fiachines have been proposed or constructed with a stamping or pounding action.

ing do not I find that the present methods of hydratproduce the strongest paper obtanable 'from a given fiber and also that 'such methods take along time to'produce the requisite degree of hydration, wetness or commonly msnamed greasiness, of the pulp which is necessary to produce a paper with the greatest strength obtainable from any fibe'r or material. I also find that any desired degree of hydration is obtaina'ble by subjectug the finely divided and wet the machine and is cut by' pulp to a compound mechanical treatment comprising a simultaneously exerted .or combined gentle hammering or tapping and a rubbing or dragging action instead of the abrading action hitherto dopted, such so treatment or tapping' causing the individual fibers of the pulp to absorb moisture much more r'apidly and efliciently, thus securing the requisite hydration without breaking or injuring the fiber. u y invention therefore consists in the process or method of treating fibers for the preparation of paper pulp by subjecting i the wet fibers or fibers Suspended in water to the above described compound or com- 7'o bined treatment which is repeated continuously or in rapid succession.

This invention will be fullydescribed With reference to the accompanying drawings in which amachine adapted for carrying out the invention is illustrated. l i Figure l is a side elevation of the machine. Fig. 2 is a plan of same. Fig. 3 is a side elevation of a similar machine set inclined. Fig. 4: is a side elevation lar machine set horizontal. Fg. 5 is a vertical sectional elevation of part of the machine. Fig. 6 is a transverse sectional plan on line a-w Fig. 5. Fig. 7 is a transverse sectional plan on line y vg Fig. 5. Fig. 8 is a sectional elevation showing spiral ribs. Fig. 9 is a transverse sectional plan show-1 ing a modified Construction. F igs. 10 and 11 are elevation and plan respectively of one form of the beater. Figs. 12 to 17 show other forms of beater.

' In carrying out the invention I employ a machine With a rotor A arranged in a case B, therotor being fitted with a number of beaters C pivoted thereto,and the interior of the case B constructed with internal pro-r jections D in the path of the beaters, against which projections the beaters operate with a combined gentle vibratory tapping or hammering and a rubbing or dragging action as they revolve; The aforementioned projections are preferably formed by fluting the interior of the case as shown in Figs. 6 and 7, and 'such fluting may be spiral as in the case B' beaters C are preferably in the form of blades pivoted to brackets c bolted 'to the rbtor shaft A as in F igs. 5, 10 and 11 or in the form of rollers C' as in Figs. 12 and 13, or in the form of pivoted links or' blades 110 of a s'imi- 80 in Fig. 8. The

seribed treatment by the beaters as 0 as in Figs. 14 and 15, or pivoted blocks 0 as in Figs. 16 and 17.

In the arrangement shown in Fig. 9, the rotor 0 is corrugated or fluted, and flexible spring beaters are attached to the case B The rotor may be fitted with ascrew propeller D' which forces the pulp upward and the casing B is fitted at intervals'with inclined vanes or blades E which also raise the pulp as it is carried around by the beaters. The mixed fiber and water forming the pulp is caused'to circulate by the screw propeller D' or by a rota-y punp through the ease is achieved, during which cireulation the fibers are subjected neeessarily to above-dethe latter pass over the ribbed surface of'the case B, or of the rotor,` according as one construction or the other is followed. The suc cessive continuously repeated treatment of the wet fibers gradually reduces them and also renders them more absorptive or more ready to absorb the mosture and become B until the desired result' hydrated than does any grinding, tearing ::i

or rubbing action.

By this process I obtain much better hy` dration of the pulp and in a much shorter time than by the older methods of pulping and I also obtain a stronger paper.

What I claim as my invention and desire to protect by Letters Patentisz- `he hereidescrbed method of preparing previously ground paper pulp which consists in impartng a circulatory` movement to the pulp and repeatedly subjectin the fibers during such circulation to a'mec anical treatment comprising' a continuously repeated combined vibratory tapping or hammering and a rubbing 'or dragging action. i

In testimony whereof I have hereunto'set my hand in presence of two subscribing witnesses. p

HAROLD JACKSON. Witnesses:

I. OWDEN O'BRIEN, HARRY BARNFATHER. 

